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SPECIFICTION
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unbuild

github.com

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Spec score 7.1 #26 of 27 in JavaScript Build Tools

Spec sheet

Purpose
unbuild is a unified JavaScript build system.Read 8 Oct 2026 · github.com
License
The repository is released under the MIT license.Read 8 Oct 2026 · github.com
Maker
The repository is published under the unjs GitHub organization.Read 8 Oct 2026 · github.com
Additional integration
The README lists integration with untyped for type generation.Read 8 Oct 2026 · github.com
Build checks
It checks for potential missing and unused dependencies and can fail CI when it finds build issues.Read 8 Oct 2026 · github.com
Bundleless builds
Integration with mkdist enables bundleless distributions with file to file transpilation.Read 8 Oct 2026 · github.com
Bundling
Its Rollup based bundler supports TypeScript and generates CommonJS and module formats plus type declarations.Read 8 Oct 2026 · github.com
Configuration
It can infer build configuration and entries from package.json.Read 8 Oct 2026 · github.com
Configuration formats
Configuration can be provided through an unbuild key in package.json or a build.config file with JavaScript, TypeScript, or JSON extensions listed in the README.Read 8 Oct 2026 · github.com
Configuration options
Configuration can be provided through an unbuild key in package.json or a build.config file in supported JavaScript, TypeScript, or JSON extensions.Read 8 Oct 2026 · github.com
Development mode
The --stub option creates a dist stub powered by jiti, so a project can be linked without watching and rebuilding during development.Read 8 Oct 2026 · github.com
Development workflow
The --stub option creates a dist stub using jiti so a project can be linked without watching and rebuilding during development.Read 8 Oct 2026 · github.com
Output inspection
CLI output includes output size and exports.Read 8 Oct 2026 · github.com
Successor project
The README says the maintainers are experimenting with obuild as a next generation successor based on rolldown.Read 8 Oct 2026 · github.com
Type generation
unbuild integrates with untyped for type generation.Read 8 Oct 2026 · github.com

Plans and prices

MIT-licensed open-source software Free MIT license · No paid plans stated Read 8 Oct 2026 · github.com
unbuild Free MIT licensed · JavaScript build system Read 8 Oct 2026 · github.com

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